pmtimeval(3) — Справочная страница Linux

PMTIMEVALNOW(3)         Library Functions Manual         PMTIMEVALNOW(3)

НАЗВАНИЕ

       pmtimevalNow, pmtimevalInc, pmtimevalDec, pmtimevalAdd,
       pmtimevalSub, pmtimevalToReal, pmtimevalFromReal, pmPrintStamp -
       helper routines for time stored as a struct timeval

C СИНТАКСИС

       #include <pcp/pmapi.h>

       void pmtimevalNow(struct timeval *tv);
       void pmtimevalInc(struct timeval *ap, const struct timeval *bp);
       void pmtimevalDec(struct timeval *ap, const struct timeval *bp);
       double pmtimevalAdd(const struct timeval *ap, const struct
       timeval *bp);
       double pmtimevalSub(const struct timeval *ap, const struct
       timeval *bp);
       double pmtimevalToReal(const struct timeval *val);
       void pmtimevalFromReal(double secs, struct timeval *val);
       void pmPrintStamp(FILE *f, const struct timeval *tp);

       cc ... -lpcp

ОПИСАНИЕ

       pmtimevalNow is a platform-independent method that returns the
       current system time since the Epoch in tv.

       pmtimevalInc adds the time in ap to the time in bp and stores the
       result in ap.  Similarly pmtimevalDec subtracts the time in bp
       from the time in ap and stores the result in ap.

       pmtimevalAdd (and pmtimevalSub) add (and subtract) times and
       return the result as a double value.  The time in the ap argument
       is not changed.

       pmtimevalToReal converts the time in tp to an equivalent double
       value.  pmtimevalFromReal provides the reverse conversion, taking
       the time in secs and returning the equivalent time in val.

       pmPrintStamp prints the timestamp from tp on the stream f in the
       local time (as returned by pmLocaltime(3)) in the format
       HH:MM:SS.XXX.

ПРИМЕЧАНИЯ

       For variants of these interfaces using nanosecond precision and
       the timespec structure, refer to pmtimespecNow(3).

СМОТРИ ТАКЖЕ

       gettimeofday(2), time(2), PMAPI(3), pmLocaltime(3) and
       pmtimespecNow(3).

КОЛОФОН

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨http://www.pcp.io/⟩.  If you have a bug report for this manual
       page, send it to pcp@groups.io.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
       (At that time, the date of the most recent commit that was found
       in the repository was 2024-06-14.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

Performance Co-Pilot               PCP                   PMTIMEVALNOW(3)

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